问题
解答题
求下列未知数的值. (1+30%)x=45.5 x:
2x×
|
答案
(1)(1+30%)x=45.5
130%x=45.4
130%x÷130%=45.5÷130%
x=35;
(2)x:
=0.85 4
x=
×0.85 4
x=1;
(3)2x×
=9 10 1 5
x=9 5 1 5
x÷9 5
=9 5
÷1 5 9 5
x=
.1 9
求下列未知数的值. (1+30%)x=45.5 x:
2x×
|
(1)(1+30%)x=45.5
130%x=45.4
130%x÷130%=45.5÷130%
x=35;
(2)x:
=0.85 4
x=
×0.85 4
x=1;
(3)2x×
=9 10 1 5
x=9 5 1 5
x÷9 5
=9 5
÷1 5 9 5
x=
.1 9